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TSTool / Command / SetPropertyFromObject

Overview

The SetPropertyFromObject command sets the value of a property used by the time series processor by copying a property from an object. Typical uses of the command are:

  1. Use a JSON file to provide configuration properties to a workflow.
  2. Check whether an input JSON file contains expected properties.

Command Editor

The command is available in the following TSTool menu:

  • Commands / Object Processing

The following dialog is used to edit the command and illustrates the command syntax for general parameters.

SetPropertyFromObject command editor

SetPropertyFromObject Command Editor (see full-size image)

The object property name (ObjectProperty) is specified using a period-delimited string, with periods used to separate object levels.

Currently, properties can only be set from single object properties, not from a property in an array. This functionality may be added in the future.

Command Syntax

The command syntax is as follows:

SetPropertyFromObject(Parameter="Value",...)

Command Parameters

Parameter                           Description Default          
ObjectID
required		 The identifier for the object containing the property to provide the value. None - must be specified.
ObjectProperty
required		 The object's property name, specified using periods for the delimiter between object levels. None - must be specified.
PropertyName
required		 The name of the property to set. None - must be specified.
PropertyType The property type to use for the property value, one of:
  • Boolean – a boolean
  • DateTime – a date/time
  • Double – a floating point number
  • Integer – an integer
  • String – a string
Compatible types (e.g., string to integer) will be converted. Null input (and conversion from empty strings) will result in null output if AllowNull=True or an error otherwise. Incompatible conversions will result in an error.		 Use the type from the object's property.
AllowNull Whether the property value is allowed to have a null value (True) or or not (False). False

Examples

See the automated tests.

The following JSON file is consistent with the editor example above. In this case, the object property is specified with ObjectProperty=float.

{
  "float" : 1.234,
  "int" : 1234,
  "bool": true,
  "string" : "abcde",
  "date" : "2022-10",
  "datetime" : "2022-10-01 01:01:01",
  "nullString" : null
}

Troubleshooting

See the main TSTool Troubleshooting documentation.

See Also